Mason stains in the G2934 matte base glaze at cone 6

Tuesday 1st April 2014

insight-live.com/glossary/182">Stains can work surprisingly well in matte base glazes like G2934. But they perform differently in a matte host glaze. The glass is less transparent and so varying thicknesses do not produce as much variation in tint. Notice how low many of the stain percentages are here, yet most of the colors are still bright. A good reason to minimize stain concentration is to avoid leaching. We tested 6600, 6350, 6300, 6021 and 6404 overnight in lemon juice, they passed without any visible changes. It is known that MgO mattes, like this one, are less prone to acid attack that CaO mattes. A down-side to the MgO-matte-mechanism is that chrome-tin stains do not work (e.g. 6006), high CaO content is needed in the host glaze to develop the color. The inclusion stains 6021 and 6027 work very well in this base. As do the 6450 yellow and 6364 blue. And the 6600 produces an incredible gunmetal black. The 6385 is an error, it should be purple (that being said, do not use it, it is ugly in this base). The degree-of-matteness can be tuned by blending in some G2926B glossy base.

Pages that reference this post in the Digitalfire Reference Library:

Mason 6021 Red Stain, G2934 - Matte Glaze Base for Cone 6, Mason 6027 Stain, Stain 6201, Stain 6134, Stain 6100, Stain 6006, Stain 6020, Stain 6666, Mason 6600 Black Stain, Stain 6500, Stains Mason, Ceramic Stain, Base Glaze, Cone 6, Medium Temperature Glaze

This post is one of thousands found in the Digitalfire Reference Database. Most are part of a timeline maintained by Tony Hansen. You can search that timeline on the home page of digitalfire.com.